Fix merge-resolution braces in PrintHostDialogs.hpp + PhysicalPrinterDialog.cpp

The 8dfd480c52 merge stripped <<<<<<<, =======, >>>>>>> markers
from three files. Two of the resolutions ended up syntactically
broken:

* PrintHostDialogs.hpp: both sides of the conflict added a new class
  declaration in the same spot. The common closing }; lived after
  the >>>>>>> marker, so concatenating without re-adding a closing
  brace between the two classes left CrealityPrintHostSendDialog
  unclosed. Compiler caught it via "storage class specified for
  EVT_PRINTHOST_PROGRESS" at the wxDECLARE_EVENT lines (the events
  were being parsed inside the still-open class body).

* PhysicalPrinterDialog.cpp: upstream's BonjourDialog fallback was
  inside an `else { }` block whose closing brace remained after I
  replaced the else with explicit early-return branches. Result was
  one extra `}` after the Bonjour block.

No public commits affected -- the broken merge commit is still
local-only on LXC 104. Catching this before the force-push.

src/slic3r/GUI/PhysicalPrinterDialog.cpp

@@ -257,7 +257,6 @@ void PhysicalPrinterDialog::build_printhost_settings(ConfigOptionsGroup* m_optgr
                 m_optgroup->set_value("print_host", dialog.get_selected(), true);
                 m_optgroup->get_field("print_host")->field_changed();
             }
-            }
         });
 
         return sizer;

src/slic3r/GUI/PrintHostDialogs.hpp

@@ -217,6 +217,8 @@ private:
     };
     std::vector<SlotInfo>   m_printer_slots;
     std::vector<BitmapComboBox*> m_slot_combos; // one per gcode filament
+};
+
 class FlashforgePrintHostSendDialog : public PrintHostSendDialog
 {
 public: